There are 12 words that start with 'order'.
| order | orders | 
| ordered | orderer | 
| orderly | orderers | 
| ordering | orderable | 
| orderless | orderlies | 
| orderliness | orderlinesses | 
Note: These 12 words that start with 'order' are found from the USA & Canada version of the tournament Scrabble word list.